Rekensommen met erbij en eraf tot 100
In de mix
1.
40
20
–
=
2.
40
30
–
=
3.
70
10
+
=
4.
80
60
–
=
5.
10
10
+
=
6.
20
80
+
=
7.
30
20
–
=
8.
60
30
–
=
9.
90
30
–
=
10.
20
40
+
=
11.
70
40
–
=
12.
40
10
+
=
13.
100
30
–
=
14.
20
10
+
=
15.
80
20
–
=
16.
70
60
–
=
17.
90
50
–
=
18.
100
60
–
=
19.
90
20
–
=
20.
40
40
+
=
21.
60
50
–
=
22.
30
60
+
=
23.
30
10
+
=
24.
50
50
+
=